Fugitive one mechanism for typewriting and accounting machines



1951 o. J. SUNDSTRAND I 2,573,508

FUGITIVE ONE-MECHANISM FOR TYPEWRITING AND ACCOUNTING MACHINES OriginalFiled Sept. 4, 1944 11 Sheets-Sheet 1 INVENTOR. OSCAR J SUNDSTRANDATmR/VEY 06L 1951 o. J. SUNDSTRAND 2,573,503

FUGITIVE ONE-WCHANISM FOR TYPEWRITING AND ACCOUNTING MACHINES OriginalFiled Sept. 4, 1944 ll Sheets-Sheet 2 ATTORNEY 1951 o. J. SUNDSTRAND2,573,508

FUGITIVE ONE-WCHANISM FOR TYPEWRITING AND ACCOUNTING MACHINES OSCAR J.SUNDSTRANO A T TORNEV 1951 o. J. SUNDSTRAND 2,573,508

FUGITIVE ONEJECHANISM FOR TYPEWRITING AND ACCOUNTING MACHINES OriginalFiled Sept. 4, 1944 ll Sheets-Sheet 4 IN V EN T 0R. 0.904? 1/.SUAAOST/PA/VD ATTOR N EY FUGITIVE ONE-LECHANISM FOR TYPEWRITING ANDACCOUNTING MACHINES Original Filed Sept. 4, 1944 Oct. 30, 1951 o. J.SUNDSTRAND 11 Sheets-Sheet 5 1951 i o. J. SUNDSTRAND Y 3 FUGITIVEONE-MECHANISM FOR TYPEIWRITING AND ACCOUNTING MACHINES Original FiledSept. 4, 1944 ll Sheets-Sheet 7 INVENTOR 0504/? M JV/A/DST AND BY 0 fATTORNEY FUGITIVE ONE-MECHANISM FOR TYPEWRITING AND ACCOUNTING MACHINESOriginal Filed Septf4, 1944 Oct. 30, 1951 o. J. SUNDSTRAND 11Sheets-Sheet 8 INVENTOR 056/11? 1 awn/0 STRA/Vfl div Mk;

ATTORNEY Q 1951 o. J. SUNDSTRAND 2,573,508

FUGITIVE ONE-MECHANISM FOR TYPEWRITING AND ACCOUNTING MACHINES l1Sheets-Sheet 9 Original Filed Sept. 4, 1944 Q 1951 o. J. SUNDSTRAND2,573,508

FUGITIVE ONE-MEICHANISM FOR TYPEWRITING AND ACCOUNTING MACHINES OriginalFiled Sept. 4, 1944 ll Sheets-Sheet l0 '472 I82 k 1* 52 4Z will 450Mfg?" INVENTOR 222 9565 4/. 5 UNDS TA /1ND BY 0. 7

ATTORN EY 1951 o. J. SUNDSTRAND I 2,573,508

FUGITIVE ONE-MECHANISM FOR TYPEWRITING AND ACCOUNTING MACHINES llSheets-Sheet 11 Original Filed Sept. 4, 1944 INVENTOR05CA/Qa/JU/VDST/P/1/VD BY 9.7%

ATTORNEY Patented on. so, 1951 OFFICE FUGITIVE ONE MECHANISM FOR TYPE-WRITING AND ACCOUNTING MACHINES Oscar .Lsundstrand, West Hartford,Conn., as-

signor to Underwood Corporation, New York, N. Y., a corporation ofDelaware Original application September 4, 1944, Serial No. 552,656.Divided and this application March 31, 1948, Serial No. 18,143

4 Claims.

This invention relates to combined typewriting and accounting machinesof the type provided with a register or totalizer in which numbers areentered, digit by digit, and more particularly to a fugitive onemechanism for such machines.

One object of the present invention is to improve the construction andmode of operation of the accounting mechanism for machines of the abovetype and to provide such machines with a novel and improved fugitiveone" mechanism.

Another object of the invention is to provide, in machines of the abovetype having a direct subtraction register or totalizer in which numbersare entered, denomination by denomination, with a novel and improvedfugitive one mechanism which will operate in a reliable manner both whenthe totalizer is actuated in an adding direction and when the totalizeris actuated in a subtracting direction.

With the above objects in view, the invention consists in a machineembodying the novel and improved features, constructions andcombinations of parts hereinafter described and particularly pointed outin the claims, the advantages of which will be readily understood andappreciated by those skilled in-the art.

This application constitutes a division of applicant's pendingapplication Serial No. 552,656, flied September 4, 1944.

The various features of the invention will be clearly. understood fromthe accompanying drawings illustrating a machine embodying the inventionin its preferred form, and the following detailed description of theconstruction therein shown.

In the drawings:

Fig. 1 is a perspective view of a machine embodying the invention,showing the mechanism more directly concerned in the invention in fulllines, and the remainder of the machine in dotand-dash lines,

Fig. 2 is a view in rear elevation illustrating particularly the typehead or carriage of the machine,

Fig. 3 is a view in vertical section of the machine illustratingparticularly the type bar and differential actuator mechanisms,

Fig. 4 is a detail view in rear elevation illustrating the drivingmechanism for the master wheel for operating the column registers,

Fig. 5 is a view similar to Fig. 3 illustrating a portion of themechanism shown in Fig. 3 on an enlarged scale,

Fig. '6 is a detail plan view illustrating the mechanism for renderingthe differential mechanism operative when the carriage is in the zone ofa column register and the decimal space or trip mechanism,

Fig. 7 is a view in side elevation illustrating particularly certainparts of the mechanisms shown in Fig. 6, and certain associated parts,

Fig. 8 is a detail view in vertical section illustrating particularlythe mechanism for rendering the differential mechanism operative whenthe carriage is in the zone of a register,

Fig. 9 is a view in rearelevation illustrating the driving means for oneof the cross-computing registers and the mechanism for controlling thestate 'of said driving means, as to addition or subtraction, from thesubtract key and from an automatically acting subtract cam,

Fig. 10 is a plan view of a portion of the machine and illustratingparticularly one of the cross-computing register mechanisms,

Fig. 11 is a detail view in side elevation illustrating particularly thetransfer reset mechanism for one of the cross-computing registers,

Fig. 12 is a view in rear elevation showing certain parts of themechanism illustrated in Fig. 11 and certain asosciated parts,

Fig. 13 is a detail perspective view illustrating particularly certainparts of the fugitive one" mechanism,

Fig. 14 is a view in side elevation illustrating I the right-handcross-computing register and the fugitive one mechanism for saidregister,

Fig. 15 is a view in side elevation illustrating a portion of themechanism shown in Fig. 14 with certain of the parts in difierentpositions,

Fig. 16 is a view in side elevation illustrating a portion of themechanism shown in Fig. 14 with certain of the parts in still differentpositions,

Fig. 17 is a view in side elevation illustrating a portion of themechanism shown in Fig. 14 with certain of the parts in still differentpositions,

Fig. 18 is a detail view in side elevation illustrating the regulartwo-way transfer mechanism of the crossfooter, and

Fig. 19 is a view in side elevation illustrating the driving mechanismfor the machine.

The invention is illustrated and described in this application asapplied to a combined typewriter and accounting machine of the ElliottFisher type, the typewriting and accounting mechanisms of which havesubstantially the same construction, arrangement and mode of operationof parts as the corresponding mechan- 3 isms in the machine illustratedand described in applicants Patent No. 2,370,505, dated February 27,1945. As shown and described in said patent, the type bar mechanisms andthe differential actuating mechanisms are operated by p wer from asuitable motor.

In the illustrated construction, the machine comprises a platen frame,one of the side rails of which is indicated at I, Fig. 3, asubstantially flat platen 3 mounted for vertical movement in said frame,a line space frame, a portion of which is indicated at mounted forforward and rearward movement on said platen frame and mechanisms forimparting a line spacing movement to the line space frame at the end ofeach return movement of the carriage, all as shown and described in saidpatent.

Upon the line space frame is supported a type carriage or head indicatedas a whole at 1 upon which is mounted the usual series of type bars eachcarrying one or more types for engaging the work sheets supported on theplaten. The

type bars are arranged to be operated by power driven mechanism in thepresent machine, and this mechanism, in part, is carried by thecarriage. The carriage also carries the usual series of keys forming thekeyboard of the machine and controlling the coaction of the type barswith the power driven mechanism. The carriage also carries a masterwheel by which the totalizers or registers are driven and mechanism fordriving the master wheel differentially by power to set up or entersuccessively the various digits of a number step by step in a register.

The type carriage is mounted for movement forwardly and rearwardly withthe line space frame and is also mounted for lateral movement on saidframe in a right-hand direction to letter space during a typingoperation and for return movement in a left-hand direction to restorethe carriage to position for starting the typing of a line. The carriageis provided with front and rear wheels or rollers (see Figs. 2 and 3)arranged to engage, respectively, the front and rear rails of the linespace frame of which the rollers engaging the rear rail 8 are indicatedat I I. The carriage is acted upon by the usual metallic band I: havingone end attached to the carriage and connected with the usual springdrum II which tends yieldingly to move the carriage constantly in aright-hand direction along the rails of the line space frame, as shownin said patent. The lette spacing movement of the carriage is controlledby the usual escapement mechanism, indicated as a whole at I1, thisescapement mechanism preferably having substantially the sameconstruction, arrangement and mode of operation of parts as theescapement mechanism shown and described in the patent to Foothorap, No.1,203,519, dated October 31. 1916.

TYPE ACTION (See Fig. 3)

The present machine is provided with a series of type bars i9 eachpivoted at 2i to a hanger 23 secured to the semicircular type bar ring25 suspended below the deck 21 of the carriage. The type bars are,respectively, acted upon by coil springs 28 which operate to retract thebars and tend to retain them in their normal positions in engagementwith a semicircular buffer ring Ii.

The tail of each of the type bars is connected b a link 33 with an elbowlever 35 pivoted at 31 upon a hanger 38 depending from the deck 21. Eachelbow lever is connected by a link II with the forward end of asub-lever ll pivoted at 45 upon a support 41 secured to the upper faceof the deck 21. The rear end of the sublever 43 is connected by a linkor push rod 40 with a horizontally arranged intermediate lever 5|pivoted on a fulcrum bar '3 extending across the rear of the keycarriage. Each of the intermediate levers BI is acted upon by a coilspring 55 which assists the retracting spring II in yieldingly holdingthe parts of the mechanism in the normal positions shown in Pig. 3.

POWER DRIVEN TYPE BAR ACTUA'I'ING MECHANISM (See Figs. 3 and 5) In thepresent machine, power driven mechanism is provided for swinging theintermediate levers Si in a downward direction about the fulcrum bar 53to actuate the type bars. This mechanism comprises a transmitting link81 pivotally connected to the intermediate lever Ii by means of a stud59. The transmitting link is pivoted at $1 to a radius arm or lever 63which is Journaled on a rod 65 extending longitudinally of the typecarriage and supported on the cover plate 61. Said mechanism alsocomprises a driving link 69, the lower end of which is pivoted at 11 tothe radius arm 53. A pawl 18 is pivoted at 15 to the driving link and isprovided with two teeth arranged to engage the teeth of a continuouslyrotating toothed or fluted shaft 11 mounted in hearings in the typecarriage. The lower end of the driving link is acted upon by a coilspring 19 which tends to swing the link in a clockwise direction aboutthe pivot II and to normally maintain the link substantially in theposition shown in Fig. 5 with the pawl II in engagement with a fixedinclined arresting plate 8| extending across the type carriage. in whichposition the pawl is disengaged from the toothed shaft. In order toengage the pawl with the shaft, the driving link 69 is swung to the left(Figs. 3 and 5) about the pivot 1|. The shaft 11 is continuously drivenby power through suitable driving connections from a motor II as shownand described in said Patent No. 2,370,505. Upon the engagement of thepawl with the shaft and the turning of the pawl 13 about the pivot 15 toits limiting position, the driving link I is driven in a downwarddirection to actuate the transmitting link 51 and the intermediate leverII downwardly.

The driving links are swung to the left to engage the respective pawlcarried thereby with the toothed shaft by mechanism actuated by the keysof the keyboard. This mechanism comprises a drag link 05 connected atits left-hand end (Fig. 3) with an upwardly extending arm of the keylever 81 and having a shoulder 89 adjacent its right-hand end arrangedto engage a pin ll mounted on the driving link I. The left-hand end ofthe drag link is connected with the upwardly extending arm of the keylever 01 by means of a stud 93 mounted on the link and engaging in aslot in said arm of the key lever and a coil spring 91 which normallyholds the stud 93 seated in the left-hand end of the slot. Each of thekey levers 81 is pivoted on a shaft 91a common to the keys of all thebanks and is provided with a forwardly extending arm on which is fixed akey 99. The end of the upwardly extending arm of each of the key leversextends through a guide slot ill formed in a guide plate I03 secured tothe upper portion of the frame of the type carriage and the movement ofthe key lever is limited by the engagement of said arm with the ends ofthe guide slot. Each ofthe key levers is acted upon by a coil spring I55which normally maintains the upwardly extending arm thereof inengagement with the rear end of the uide slot.

With this construction, upon the depresion of the key 99 of the keylever, the upwardly extending arm thereof will be swung forwardly or tothe left (Fig. 3) to engage the pawl I3 with the toothed shaft 11.

when the key is depressed to actuate the key lever to swing the drivinglink to the left to engage the pawl with the toothed shaft, the movementof the driving link is limited by the engagement of the pawl with saidshaft. As the driving link is carried downwardly by the rotary movementof the shaft, the link is swung to the left during the latter part ofits movement by the engagement of the pawl contacting tooth of the shaftwith the upper tooth of the pawl, the movement of said tooth of theshaft then having a substantial component, toward the left (Fig. 3). Inorder to a limit this swinging movement of the driving link and causethe disengagement of the pawl from the tooth of the shaft at the desiredtime in the actuation of the type bar a series of stop plates II" areadjustably mounted on the guide plate I03 and are arranged to beengaged, respectively, by the upper ends of the driving links to limitthe swinging movement thereof.

The free rear ends of the drag links 35 project through guide slots I09formed in the upper portion of the arresting plate lI. The bottom wallsof these slots limit the downward movement of the drag links under theinfluence of the springs 91 as the driving links move downwardly to actuate the type bars.

The trailing ends of the driving links 53 travel up and down and moveforwardly and rearwardly in guide slots III formed in a transverse barII3 supported on the frame of the type carriage.

INTERLOCK FOR DRIVING LINKS (See Fig.

An interlock mechanism is provided for preventing more than one of thedriving links from being swung forwardly into operating position at thesame time. Thismechanism comprises a series of interlocking balls "9aconfined in a channel I I Ia formed in the bar I I3 as shown anddescribed in said Patent No. 2,370,505.

ESCAPEMENT MECHANISM (See Fills. 2 and 3) The present machine, as statedabove, is provided with an escapement mechanism for controlling theletter spacing movement of the type carriage, and has substantially thesame construction, arrangement and mode of operation of parts as thecorresponding mechanism illustrated and described in the patent toFoothorap, No. 1,203,519. This escapement mechanism comprises a carriagefeed rack I I5 (see Fig. 3) secured to the rear rail 9 of the line spaceframe and a feed pinion III journaled on a shaft H5 having its endsengaged in suitable supports on the frame of the type carriage. To thispinion is secured an escapement wheel I2I controlled by escapement dogsI23 and I25 arranged to engage said wheel and operated from theuniversal bar by means of the usual draw wire I21. The holding dog I23is pivoted at I29 on the bracket I3I suspended 6 from the deck 21, thespacing dog I25 Is pivoted at I33 on said bracket and said dogs areconnected by a link I35 and by an operating spring I31 as fully shownand described in said patent. The draw wire III is connected at itsupper end withanarm I39 (seeFig. 3) securedtoarock shaft'IlI arrangedtransversely of the type carriage. Arms I43 are secured to this rockshaft from which is suspended a universal bar I45. This bar extendsbeneath the several intermediate levers 5| and is arranged to be engagedby an abutment screw I" mounted in each of said levers. The depressionof the universal bar I45 by the downward movement of any one of theintermediate levers 5| swings the rock shaft I in a counterclockwisedirection (Fig. 3) thereby swin ing upwardly the arm I33 to swing theholding dog I23 out of operative position and to swing the spacing dogI25 into operative position. The rock shaft is returned to normalposition by a return spring 5 connected to a depending arm I5I on theshaft. Return movement of the rock shaft swings the arm I35 downwardlyand releases the draw wire I2I, permitting spring I31 to move thespacing dog I25 out of operative posiapin I53 mountedin a fixed arm I55to limit the movement of the dog.

The escapement mechanism is controlled from the space bar by mechanismhaving substantially the same construction, arrangement and mode ofoperation of parts as the corresponding mechanism illustrated anddescribed in applicant's Patent No. 2,239,023, dated April 22, 1941.This mechanism comprises devices operated by power for swinging the rockshaft Ill in a counterclockwise direction (Fig. 3) to throw out theholding dog I23 and to throw in the spacing dog I25, and the parts arerestored to their normal pofltions by the action of the restoringsprings I31 and I.

REGISTER- DIFFERENTIAL ACTUATOR MECHANISMS (See Figs. 3 and 5) Themachine illustrated is provided with a series of registers I63 mountedat the rear of the machine upon a register bar I65 fixed to the linespace frame, said registers being provided with totalizer wheels I61,IGIa and Iilb. The type carriage is provided with power-driven mechanismfor actuating the totalizer wheels of the column registers to set upnumbers in said wheels. This mechanism is controlled by the numeral keysof the typewriter keyboard. This mechanism comprises a master wheel I69(Fig. 3) located at about the middle of the type carriage at the rearthereof and extending rearwardly from the carriage into position toengage the lowest set of wheels 'of the totalizer mechanism. The masterwheel is fixed to a shaft journaled in the carriage and is connected bysuitable gearing with the main differential actuator shaft III extendingacross the type carriage and journaled in suitable bearings I510 (Fig.2) supported on the frame of the carriage.

The shaft I'll is rotated differentially to impart diiferentialmovements to the master wheel I69 and to the totalizer wheels of aregister to enter the desired numbers in the register by differentialmechanisms selectively controlled from the several numeral keys of thetype bar mechanisms. Thesediiferential mechanisms arethrown asvasoa intooperation by the corresponding numeral type bar actuating mechanisms.The said differential mechanisms have substantially the sameconstruction, arrangement and mode of operation as the correspondingmechanisms shown and described in applicant's Patent No. 2,370,505. Theseveral mechanisms for differentially rotatin the shaft IlI undercontrol of the numeral keys for the numbers from 3 to 9", inclusive, toenter corresponding numbers in the register, all have the same generalconstruction, arrangement and mode of operation of parts, thesemechanisms differing only in the respects hereinafter pointed out tovary the rotative movement imparted to the shaft.

Each of these mechanisms (see Figs. 3 and 5) comprises a rack bar I12,pivotally suspended at I15 on an arm Ill which is pivoted on a shaft I19extending across the type carriage. These arms are acted upon by a bailI 8| also pivoted on said shaft and normally held yieldingly indepressed position by a spring IN, the bail engaging the upper sides ofthe arms as shown in Fig. 5. The downward movement of the ball islimited by an adjustable stop lever I85 such as shown in saidapplication Serial No. 552,656.

Each of the racks I13 is provided, on the rear side thereof, with aseries of downwardly inclined teeth arranged to engage the teeth of agear Ill, fixed to the shaft I1I, the teeth of gear I81 being inclinedin a clockwise direction, Figs. 3 and 5. The shaft I1I is connected withthe master wheel I69 to drive the same by suitable gearing hereinafterdescribed. Each of the rack bars is also provided on its forward sidewith a series of downwardly inclined teeth arranged to engage the teethof a continuously rotating power driven toothed or fluted shaft I93extending across the type carriage and journaled in bearings carried bythe side plates I95.

Each of the rack bars is normally held in a position intermediate theshaft I93 and the corresponding gear I81, as shown in Fig. 5, in whichit is disengaged from both shaft and gear. The mechanism for holdingeach rack in this position comprises a pin I91 secured in the baradjacent the lower end thereof and engaging in a recess in a lever I99pivoted at "I on an upright supporting plate or bracket 203 secured tothe cover plate 61. This lever is acted upon by a coil spring rmechanism for entering a given digit in the totalizer wheels of aregister, the rack bar I13 corresponding to this digit is swungforwardly to engage the teeth on the forward side of the rack bar withthe teeth of the continuously rotating shaft I93. The rotation of shaftI93 then moves rack bar I13, arm Ill and the bail Ifll upwardly againstthe tension of the spring I83. When the rack bar has been moved upwardthe distance required for the subsequent action thereof, it is swungrearwardly to disengage the teeth on the forward side thereof from theshaft I93, this movement being limited to prevent the engagement of theteeth on the rear side thereof at this time with the gear I81. The rackbar is then moved downward by the action of the bail III. At apredetermined point in the downward movement of the rack bar, the bar isswung further to the rear to engage the teeth on the rear side of thebar with the gear I91, and during the continued downward movement of thebar, the gear is rotated to actuate the totalizer wheels to enter thecorresponding digit in the register.

The several mechanisms for swinging the rack bars forwardly to engagesaid bars with the continuously rotating shaft I93 are operated from theseveral corresponding intermediate levers SI connected with the numeraltype bars as these levers are moved downwardly to actuate the type barscorresponding to the numeral keys. These mechanisms, however, arerendered operative only when the master wheel I69 is in position toengage and actuate one of the wheels of a register. The position of thetype carriage when the master wheel is in position to operate thetotalizer wheels of a register will be, in certain instances,hereinafter referred to as the position of the carriage when in the zoneof a register.

The mechanism for swinging each of the rack bars forwardly comprises alever 2II (one for each rack bar) pivotally suspended at 2I3 upon an arm2I5 secured to a rock shaft 2I1 extending across the type carriage andsupported in bearings in the end plates thereof. The lever 2 projects atits lower end through a guide slot in the cover plate 61 and is formedon its left-hand side with a projection 22I arranged to engage the pinI91. The rock shaft 2I1 is acted upon by a coil spring attached to anarm on said shaft (not shown) which normally maintains the arm H5 andthe lever 2II in lowered position with the projection 22I below the pinI91. The lever 2 is connected by a link 223 with a plate fixed to theupper end of an arm 225 secured to one of the intermediate levers 5|.

The levers 2, when the carriage is not in the zone of a register, occupytheir lowered positions as shown in Fig. 5. The machine is provided withthe usual state control device and register engaging cam mechanism forcontrolling the actuation of the totalizer wheels of a. register fromthe differential mechanism when in the zone of a register, both of whichare shown and described in applicant's Patent No. 2,370,505. With thestate control device adjusted in write" or "total" positions, the levers2 will occupy their normal lowered positions, when the carriage is inthe zone of a register. With the state control device adjusted incompute" position. when the carriage is in the zone of a register, thelevers 2| I assume elevated positions to locate the projections 22Iopposite the pins I91.

With this construction, when the lever 5| of a numeral type barmechanism is swung downwardly to actuate the type bar. the correspondinglever 2 is swung forwardly through its connection with the arm 225. Ifthe lever 2II is, at this time, in lowered position, the projection 22Ithereon will not engage the pin I91 and this movement of the lever 2will not affect the position of the rack bar. However, if the lever 2 isthen in elevated position. the projection 22I on the lever will engagethe pin I91 on the rack bar, as said lever is swung forwardly, and therack bar will be swung forwardly therewith to engage the same with thecontinuously rotating shaft I93.

When the rack bar is engaged with the shaft I92, the bar is movedupwardly by the action of the shaft for the distance required for itssubsequent action and is then swung rearwardly to disengage the samefrom the shaft by means of a pin 221 projecting downwardly from asupportof the fixed cam plate 209, and then passes beyond said edge tolocate the same forwardly of the plate. The upward movement of the rackbar produced by its engagement with the shaft I93 then carries the pinin front of the cam plate. During the upward movement of the rack bar,the pin travels along the forward edge of the cam plate which is shapedas shown in Fig. and

tends to guide the lower end of the rack bar and prevent it fromdisengaging the continuously rotating shaft. As the rack bar approachesthe upper end of its movement, the upward movement of the rack carriesthe pin I91 beyond the upper end of the cam plate so that the pin leavesthe forward edge of the cam plate and the rack bar is free to swingrearwardly. -As the rack bar is swung rearwardly by the action of thepin 221, the pin I91 engages the forward side of a fixed guide plate 233(see Fig. 5) secured to the upright supporting plate 203 above the camplate 209 and arranged to leave a crossover or channel 235 between thelower edge of the same and the upper edge of said cam plate. This plate233 limits the rearward movement of the rack bar to prevent, at thattime in the cycle, the engagement of the rack with the gear I81, andforms a guide for the lower end thereof during the first part of thedownward movement of the bar.

During the first part of the downward movement of the rack bar, underthe action of the bail II, the pin I91 moves along the forward side ofthe guide plate 233 until it reaches the channel 235, the rack bar thenbeing disengaged from the gear I81. As the pin reaches the channel,which occurs at a predetermined point inthe downward movement of therack bar, said pin is directed into said channel by the cam plate 209which projects to the left some distance beyond the guide plate 233 asshown in Fig. 5. The channel 235 is inclined downwardly and to the right(Fig. 5) and, during the passage of the pin I91 through the same, therack bar is swung rearwardly by the action of the cam plate 209, therebyengaging the rack bar with the gear I81 at a predetermined point in thedownward movement of the rack bar.

During the continued downward movement of the bar under the action ofthe bail I8I, the gear I81 is actuated to accumulate the number,corresponding to the numeral key depressed, in the number wheels of thecolumn register. After the rack bar I13 is engaged with the gear I81,and the rack bar continues its downward movement, the pin I91 engagesthe rear edge of the cam plate 209 which forms a guide for the rack and.at substantially the end of the downward movement of the rack, the pinengages the projecting end of the lever I99. By the engagement of thepin with the lever, the lever is swung downwardly slightly and the pinis deflected forwardly into the recess in the lever by the contactingedge of the lever which is inclined to a slight degree to the directionof downward movement of the pin, thereby again locating the rack bar inits intermediate position.

The cam plate 209 and the guide plate 233 differ in size and contour foreach of the several actuator racks. The position of the channel 235 orthe position of the upper inclined edge of the cam plate 209 determinesthe point in the downward movement of the rack bar at which the rack baris engaged. with the gear I01 to actuate the totalizer wheels of aregister and this determines the extent of actuation of said wheels andthe number which is entered therein.

The diiferential mechanisms for actuating the gears I81, correspondingto the actuator racks controlled by the numeral keys for the numbers 1'and 2," differ in certain respects from the corresponding mechanisms foractuating corre-- sponding gears I01 under control of the numeral keysfor the numbers from 3 to "9," inclusive. These differential mechanismsfor actuating the gears I01 to enter the numbers 1 and 2 havesubstantially the same construction, arrangement and mode of operationas the corresponding mechanisms illustrated and described in said PatentNo. 2,370,505., In each of these latter mechanisms, each rack I13 isdisengaged from the fluted shaft I93 at a predetermined point in theupward movement of the rack, differing in the case of each rack, therack being immediately engaged with the corresponding gear I81 and thegear being actuated at the beginning of the downward movement of therack. Thus, the differential movement of the respective racks isproduced by disengaging the racks from the fluted shaft I93 and engagingthe same with the corresponding gear I81, with the racks in diiferentialpositions. In this case also, the upward movement of the racks isproduced by the rotation of the fluted shaft I93, and the downwardmovement is produced by the downward movement of the bail under theinfluence of the bail actuating spring as in the case of the racks forentering the numbers from "3 to "9," inclusive.

The master wheel I69 is located at about the middle of the type carriageat the rear thereof and extends rearwardly from the carriage intoposition to engage the gears I61 of the column registers. The masterwheel is fixed to a short shaft I49a (see Figs. 2 and 4) journaled inbearings in brackets I5Ia and I53a secured to the type carriage. To theshaft is fixed a pinion I55a which is constantly in mesh with a gear I51a fixed to a shaft I 59a mounted for rotative and axial slidingmovements in the brackets I5Ia and I53a. When the mechanism is set foraddition, this gear also meshes with a gear I6Ia attached to the maindifferential actuator shaft I1I extending across the type carriage andjoumaled in bearings I610 supported on the frame of the carriage. Thegear I51a, when the machine is set for subtraction, is demeshed from thegear I6Ia and meshes with a gear section I69a of a twin gear I69a, I1Iajournaled on a shaft I13a supported in the bracket I53a. The othersection I1 Ia of said twin gear is constantly in mesh with the gear IGIaand, when the machine is set for addition, thetwin gear rotates idly.

The mechanism for driving continuously the fluted shafts 11 and I93 (seeFig. 19) comprises a gear I15a fixed to the shaft 11 and a gear I11a Yfixed to the shaft I93 and meshing with the gear I15a. To the flutedshaft I93 is attached a pulley I19'a connected by a belt I8 I a with apulley I83a journaled on a hollow bearing secured to a bracket I85aattached to the frame of the carriage. This pulley is provided with asquare opening in which fits a square shaft 3111 having bearings at itsends on the line space frame, one of which is indicated at I89a in Fig.3, the pulley being slidable longitudinally of the shaft. Upon the shaftI 81a is secured a pulley I9I a connected by a belt I l l93a with apulley I951; fixed to a shaft I911: mounted in hearings on the linespace frame. To the shaft i91a is attached a gear i99a meshing with agear 2(Ha journaled on a shaft 203a secured at its ends to the linespace frame. To the gear 201a is attached a pulley 205a. connected by abelt 201a with a pulley 209a fixed to the shaft 2| la of the motor 83.

The driving connections above described between the motor 83 and thefluted shaft 11 have substantially the same construction, arrangementand mode of operation as the driving connections between the motor andthe corresponding fluted shaft shown and described in applicant's PatentNo. 2,370,505, except that, in the present construction, there is noprovision for driving the square shaft l81a at variable speeds from theshaft i91a. The sliding connection between the pulley IBM and the squareshaft I 81a maintains a driving connection between these parts whileallowing the letter spacing and return movements of the carriage.

IWEANS FOR ENABLING DIFFERENTIAL MECHANISM (See Figs. 2 and 8) Themechanism for raising the levers 2 into operative position with relationto the pins I31 comprises one of the arms 2| secured to the rock shaft2" and a link 231 pivotally suspended at 239 upon said arm. The link 231extends through a suitable slot in the cover plate 51 and is formed atits lower end with a slot 2 in which engages a pin 243 secured in theleft-hand end, Fig. 8, of a lever 245 pivoted at 241 upon a bracketdepending from the cover plate. The vertical position of the lever 245is controlled by means of a lever 24!! also pivoted at 241 on saidbracket and carrying a pin 25f which engages the underside of aninterposer 253 lying between the lever 249 and the lever 245. Theinterposer 253 is pivoted at 255 to an arm 251 fixed to a rock shaft 259supported in suitable bearings upon the underside of the cover plate 51and is formed with a shoulder 25l upon which rests, under certainconditions, a pin 263 secured in the lever 245. Thus the interposer issupported by the lever 248 and the arm 251 and the position of theinterposer longitudinally of the lever 245 is determined by the positionof the arm 251 and the rock shaft 258.

The angular position of the lever 249 is controlled by the usualregister engaging cam lever. This cam lever and the construction throughwhich it is connected to the lever 248 is similar to the correspondingconstruction illustrated and described in the patent to Foothorap, No.1,512- 282, dated October 21, 1924. The right-hand end, Fig. 8, of thelever 24! engages in a slot 255 in a vertically movable plate or slide251 located on the inside of the cover plate which is connected by a pin269 with a lever 21! located on the outside of the cover plate (seeFigs. 2 and 8), the pin 269 moving in a slot in the cover plate. Thelever 21| is pivoted upon a stud 213 secured in a downturned portion ofthe cover plate and is connected by a coil spring 215 with the cam lever219. The cam lever is also pivoted upon the stud 213 and is providedwith the usual cam 28! which is engaged and depressed to depress the camlever by a cam surface formed on the left side of a plate 283 (Figs. 3and 8) secured to the base of the register upon the movement of thecarriage into the zone of a register. The cam lever, in its downwardmovement, swings the lever 21l downwardly therewith by the engagement ofan arm 235 (see Fig. 2) formed on the cam lever with an eccentric stop231 secured to the lever 21I. Thus, through the connections described,when the register engaging cam is depressed by the locating of the typecarriage in the zone of a register, the right-hand end of the lever 24!(Fig. 8) is also depressed.

The position of the rock shaft 259 is controlled by a manually settableelement for determining the condition of the machine. When the rockshaft is at this time positioned to locate the interposer 253 in theposition shown in Fig. 8, the link 231 and the arm 2l5 will be elevatedby the action of the register engaging cam lever to raise the levers 2into operative position. When the rock shaft 253 is positioned to locatethe interposer 253 in a position to the left of that shown in Fig. 8,the shoulder 26! on the interposer does not lie beneath the pin 263, andthe arm 2| 5 and link 231 will not be elevated by the movement of thelever 24!.

The rock shaft 253 and arm 251 are located in the position shown in Fig.8 to condition the machine for operation of the totalizer actuatingmechanism. The rock shaft and arm are swung to the left from theposition shown in Fig. 8 to disable the totalizer actuating mechanism.The mechanism for positionin the rock shaft comprises an arm 233 (seeFig. 7) extending downwardly from said shaft and carrying a pin 29!projecting laterally therefrom and engaging in a slot 293 in a lever 295pivoted at 291 on the side plate 299 of the carriage casing. This leveris acted upon by a coil spring 3M which tends constantly to swing saidlever to the right. A second lever 303 is also pivoted at 291 on saidside plate and is connected with the lever 295 by means of a pin 305secured to the lever 295 and engaging in a slot formed in the lever 303.The lever 303 is pivotally connected at its upper end to a link 3" whichis supported by said lever and by a stud 3H secured in the side plate ofthe carriage and lying in a longitudinal slot 3 I 3 in the link. Thelongitudinal position of the link is controlled by means of a manuallyoperable setting lever 315 pivoted on a stud 3l1 secured in the uprightplate I at one end of the carriage and having a slot 32! at its lowerend in which engages a pin 323 secured in the link 309. The lever H5 isprovided with an arm 325 extending forwardly beyond the frame of thecarriage by which the lever may be manually adjusted. The lever isarranged to be adjusted in three different positions to control thecondition of the machine, and a detent lever 321 is pivoted at 329 onthe plate 3|! and is acted upon by a coil spring 33I which tends toswing the lever to engage the projection at the forward end thereof withany one of the three notches 333 to hold the lever in any one of thethree positions in which it may be adjusted.

DECIMAL SPACE MECHANISM The decimal space mechanism of the machine issimilar to the corresponding mechanism illustrated and described inPatent No. 1,512,282 referred to above, many of the parts havingsubstantially the same construction, arrangement and mode of operation.This mechanism comprises a trip lever 335 (see Figs. 6 and 7) secured tothe rear end of a longitudinally movable rock shaft 331 to the forwardend of which is attached an arm 33! pivotally connected to the upper endof a rod or wire 3. The lower end of this wire 13 v is pivotallyconnected to a lever 333 (see Fig. 2) pivoted at 345 upon a hanger 341suspended from the deck 21, said lever being provided with a lateralprojection which engages beneath the outwardly projecting arm 349 formedon the holding pawl of the escapement mechanism. When the decimal triplever 335 is located axially in its rearward or operative position andthe carriage is located so that the master wheel I39 is in theunits-of-dollars position of a register and a numeral key is depressed,the V-shaped projection extending upwardly at the end of the lever isengaged by the V-shaped cam I (see Fig. 3) projecting downwardly fromthe plate 283 secured to the base of the register. By the engagement ofthis cam with the decimal trip lever, the lever is swung downwardly andthe wire 3 is elevated to hold the escapement pawl I23 out of positionto engage the escapement wheel I2I, Fig. 2, until the carriage hasexecuted a two-space or double escapement movement. This movement of thecarriage disengages the projection on the decimal trip lever from thecam 35I, and the parts are then restored to their normal positions bythe action of the coil spring 353 on the lever 343. With the decimaltrip lever located in its forward position, the V-shaped projection atthe end thereof will not engage the cam 35I during the passage of thecarriage through the zone of a register.

The decimal trip lever is moved axially into and out of position to beengaged by the cam 35I by longitudinal movement imparted to the rockshaft 331 upon which the lever is mounted. The mechanism for moving theshaft longitudinally comprises a rock shaft 355 (See Fig. 6) mounted insuitable bearings carried by the frame of the type carriage and havingon one end a downwardly extending arm connected by a link 351 with thearm 339 on the rock shaft 331. To the other end of the rock shaft 355 issecured a second downwardly extending arm 359 which is connected withlever 383 by means of a link 36I (see Fig. 7). To provide a lost motionconnection between the link and said lever, the link is formed with aslot 353 in which engages a pin 365 secured in the lever. The rock shaft331 is acted upon by a coil spring 361 which constantly tends to movethe same rearwardly to locate the decimal space lever in operativeposition, the rearward movement of the shaft being limited by theengagement of the hub of the arm 339 with a bracket 359 through whichthe shaft passes.

CROSSFOOTER REGISTER MECHANISMS As shown clearly in Fig. 2 of thedrawings, the shaft I1I is extended beyond the side plates I95 of thetype carriage at each end of said carriage and right and left-handcross-computing registers or crossfooters 313 and 315 are mounted at therespective ends of the carriage. The totalizer mechanisms of thesecrossfooters are connected with the ends of said shaft for operation bythe shaft. The totalizer mechanisms of the crossfooters preferably aresubstantially identical, and each of these mechanisms has the samegeneral construction, arrangement and mode of operation of parts as thecorresponding mechanism illustrated and described in the patent toFoothorap, No. 2,145,254, dated January 31, 1939. v

The mechanism for driving the totalizer of each crossfooter comprises amaster wheel 233 (see Fig. 14) mounted on a shaft 232 to rotate 14therewith but shiftable longitudinally of the shaft to select thedenomination of the totalizer mechanism corresponding with thedenomination in which the master wheel I69 is located with relation tothe column register. The master wheel 233 is criven by mechanism similarto that shown and described in Foothorap Patent No. 1,847,429, datedMarch 1, 1932, and in Foothorap Patent No. 2,032,691, dated March 3,1936. The master wheel shaft 232 is journaled in bearings in the sideplates 311 (see Fig. 2) of the crossfooter frame and is driven from theactuator shaft "I through a gear 319 fixed to said shaft and meshingwith a gear "I journaled on and shiftable axially of the shaft 383 fixedto one of the side plates 311. When the machine is set for addition, thegear 33I is arranged to mesh with a gear 335 secured to the master wheelshaft. To set the crossfooter mechanism for subtraction, the gear 33I isshifted axially out of engagement with the gear 335 and into engagementwith one sec- 7 tion of a twin gear 381. The gear 381 is journaled on ashaft 389 secured to the adjacent side plate 311, and the other sectionof said gear is constantly in mesh with the gear 385, the gear 331rotating idly when the machine is set for addltion.

The value indicating wheels I94 are journaled on a shaft "I mounted inthe supporting plates 311 of the crossfooter frame and are arranged tobe driven in opposite directions, respectively, for addition andsubtraction by toothed denominational number wheels I98 journaled sideby side on the shaft 393 supported in the crossfooter frame plates 311,said number wheels being connected with the value indicating wheels byintermediate gears I98. The master wheels of the two crossfooterregisters are shifted axially step by step to the right, looking at thefront of the machine, into engagement successively with the wheels I98to select the denominations corresponding to the denominations of thecolumn reg-- movement of a transfer head is effected initially by theengagementof a wide tooth 2060 on the corresponding denominationalnumber wheel I98 with a trip member 226 on the head arranged in theplane of said tooth to rock the head in one 7 direction or the other atthe time in the movement of said wheel at which a transfer is required.Movement of the head is continued in the direction in which it isinitially rocked by actuating mechanism including a bell crank actuatorlever 2I4 pivoted at 2I6 on the frame of the crossfooter, a spring 2I8connected with the downwardly extending arm of the lever and urging theforwardly extending arm of the lever toward the axis of the head and alink connection 233 between the head and the latter arm of the actuatorlever. The arrangement of each head and its actuating mechanism is suchthat,

in the normal position of the parts, they assume a dead-center positionproviding a toggle lock r'esisting the action of the spring 2 I8, inwhich po sition they are yieldingly held by a pivoted detent and the arm4II.

amazon 220 urged by a spring 222 against a roller 224 mounted on one endof the link 208. Combined carrying fingers and locking dogs 229tensioned by springs 2 I0 are mounted on each head and are each providedwith a projection 2I2 arranged in the plane of the next higherdenominational number wheel I98 to impart the carrying step of movementto said wheel upon the rocking of the head.

TRANSFER RESETIING MECHANISM FOR CROSSFOOTER REGISTERS (See Figs. 11,12, 14, 17 and 18.)

After each of the transfer heads 204 is rocked into inclined position inthe manner above described, to execute a carry, the head remains in thisposition until it is positively restored to the normal or uprightposition shown in Fig. 18. The present machine is provided withmechanism which operates, immediately after the master wheel I69 leavesthe units-of-cents position in a column register, to automaticallyrestore the transfer mechanism of the crossfooter or crossfooters whichmay then be in operation. This mechanism (see Figs. 11, 14 and 1'7)comprises a rod or shaft 40I carried by spaced arms 403 secured to arock shaft 405 mounted to turn in bearings in the crossfooter frame. Inrestoring the transfer mechanism, the rock shaft 405 is turned in aclockwise direction (Fig. 14) thereby swinging the rod 40I downwardlyinto engagement with the projecting ends 401 of any of the actuatorlevers 2I4 which may have been swung upwardly out of normal position bythe rocking of a transfer head, thereby swinging the horizontallyextending arms of said levers down- \vardly therewith. This restores thelinks 205 and the transfer heads to their normal positions shown in Fig.14.

The mechanism for thus actuatin the rock shaft 405 (see Fig. 11)comprises an arm 409 secured to the rock shaft, a lever 4II fixed to arock shaft 4I3 mounted in bearings 4I5 on the frame of the carriage, andlinks 1 connecting the arm 409 with the lever I. The rock shaft 405 isreturned to its normal position by mechanism comprising an arm 4I9csecured to said rock shaft and a lever 42I pivoted at 423 on the frameof the crossfooter mechanism and connected with the arm 4I9c by a link425. The lever 42I is acted upon by a coil spring 421 which constantlytends to swing the same in a counterclockwise direction (Fig. 11) andthereby to turn the rock shaft 405 in a clockwise direction.

The lever 4II is connected by a pitman 429 with a crank pin 43I fixed ina disk 433 journaled on a Screw stud 435 threaded into a supporting baror block 431 (see Fig. 12) secured to one of the side plates of theframe of the carriage, the pitman having a lost-motion connection withthe lever 4II by means of a stud 439 secured in the lever and engagingin a slot I in the pitman. The disk 433 constitutes one element of aonerevolution clutch for actuating the pitman 429 Pivoted at So on thedisk is a pawl 445 arranged to engage the teeth of a ratchet wheel 441journaled on the hub of the disk 433 (see Fig. 11.). The pawl is actedupon by a leaf spring 449 which tends to swing the pawl into engagementwith the teeth of the ratchet wheel 441. A gear wheel 45I is fixed tothe hub of the ratchet wheel 441 and is continuously driven by means ofa gear wheel 453 secured on an extension on the shaft 11 projectingbeyond the adjacent side plate of the carriage.

The pawl 445 is held out of engagement with the ratchet wheel 441 duringthe movement of the master wheel 200 past the denominational numberwheels I99 of a crossfooter register, until the master wheel passes fromthe number wheel of the units-of-cents position, by means of a detentlever 455 pivoted at 451 on a bracket 459 (Fig. 12) attached to theframe of the carriage, which lever carries a detent stud 46I arranged toengage the tail of the pawl as shown in Fig. 11. The lever 455 is actedupon by a coil spring 453, which normally holds the lever yieldingly inposition with the stud 46I in engagement with the pawl, the movement ofthe lever under the action of the spring being limited by means of astop in 455. when the master wheel 200 passes from the units-of-centsposition in a crossfooter register, the lever 455 is swung in aclockwisedirection (Fig. 12), thereby disengaging the stud I from thetail of the pawl 445 to allow the same to be engaged with ratchet wheel441 by the spring 449. Upon the engagement of the pawl with the ratchetwheel 441, the disk 433 is given a single rotation by said wheel and,during this movement of the disk, the lever H I is swung downwardly bythe pitman 429 thereby actuating the rock shaft 405 and the rod "I torestore the transfer mechanism. Immediately after the lever 455 isactuated to cause the stud 49I to release the pawl 445, said lever is,itself, released by its actuating mechanism and, when the tail of thepawl has passed the stud, the lever is swung back to normal position bythe spring 453 thereby locating the stud in the path of the tail of thepawl. As continued rotation of the disk 433 engages the tail of the pawlwith the stud 45I, the pawl is again disengaged from the teeth of theratchet wheel 441, and the disk 433 comes to rest. To prevent reverserotation of the disk 433 when the clutch is disengaged, a spring presseddog 491 pivoted on the frame of the crossfooter is arranged to engage ina notch in said disk.

The present machine is provided with mechanism for moving the masterwheel 200 of each of the crossfooter mechanisms from denomination todenomination (see Figs. 10 and 14) along the series of numeral wheels Iduring the passage of the master wheel I99 of the column registeractuating mechanism through the several denominations of a columnregister. This mechanism has the same general construction and operationas the corresponding mechanism illustrated and described in Patent No.2,145,254, and in part in Patent No. 2,032,691, referred to above. Eachmaster wheel 200 is shifted by a master wheel carriage 459 movable on aguide 459a (see Fig. 10) in the direction of the axis of the wheel andconnected by a link "I to a forwardh! extending crank arm 41Ia fixed tothe upper end of a vertical rock shaft 413 mounted to turn in bearingsin the crossfooter framework. A rearwardly extending arm 415 is fixed tothe lower end of said shaft and is connected by a link 411a. with one ofa pair of longitudinally slidable coupling bars or slides 419 and I (seeFigs. 11 and 12), one for actuating each of the master wheel carriages.These bars are mounted side by side between a. pair of laterally spacedhousing plates 403 secured to the frame of the type carriage and saidbars slide between upper and lower series of rolls 495. The rock shafts413 are each acted upon by a coil spring 451 connected, in onecrossfooter, with the arm "in and. in the other crossfooter, with thearm 415 which 17tendstoswingeachshaftinadirectiontomaintainthecorrespondingcarriagelllinstarting position with the master wheel 2 in a position just above,or to the left of, Fig. 10, the numeral wheel ill of the highestdenomination. These springs. acting through the connecting mecha: nism,urge the coupling bars "I and lll to the left (Fig. 12). A coupling dogIll is pivoted at lli upon each-of the coupling bars and is acted uponby a coil spring 8 which tends to swing the same upwardly into positionto engage and interlock with a lug ill on the base of each columnregister. A pin or stud I is mounted on.

each of the coupling dogs lll and engages in an elongated slot lllformed in the adjacent housin! Plate lll, the stud cooperating with camsformed at the opposite ends of the slot to swing the dogs downwardly outof engaging position with relation to the lug I on the column register.

Normally the dogs lll lie in their upper or 1 a I a, spring lll tends toswing the detent lever I in a counterclockwise direction. To enable theconnecting lever Ill to be actuated from the coupling slides, the leveris provided with two downwardly extending projections Ill and Illa. the

projection Illa being arranged in front of and operative positions, onebehind the other as iliusanism is one space to the left of the numberwheel ill of highest denomination of a column register, the coupling dogor dogs lll which are in operative position will engage the lug I on thecolumn register and will hold the corresponding slide or slidesstationary during the continued advance of the carriage. Because of therelative movement of the carriage upon which the crossfooter mechanismsare mounted and the slides "l and III, the corresponding master wheel orwheels III will be advanced to the right from denomination todenomination across the corresponding series of numeral wheels ill. Whenthe master wheel Ill advances one step beyond the lowest denominationalorder of a column register, the pin 1 on each coupling dog, which isthen connected with the lug 49!, engages the cam at the right-hand endof the corresponding cam. slot lll and the dog is depressed out ofengagement with the lug thereby releasing the corresponding couplingslide. Each rock shaft 4'" is then swung by the corresponding spring ll!in a direction to carry the master wheel Ill back to its normal orstarting position and the, corresponding coupling slide is moved backto'the left to its starting position shown in Fig. 12.

The clutch control detent lever I is swung in a clockwise direction,Fig. 12, to throw the onerevolution clutch into operation to actuate theresetting mechanism for each of the crossfooters. by .the retractingmovement of either of the cou-' pling slides, following the release ofthe coupling dog from the lug I. under the action of either of thesprings "I. The mechanism for swinging the detent lever I from themovement of the slides comprises a connecting lever Ill pivoted at Ill,on the detent lever I and connected by the spring lll which the bracket4", this spring normally holding the connecting lever'in the positionshown in Fig.'l2 with relation to'the detent lever with a projection Illon the connecting 4 lever lying in engagement with a stop pin Ill ilxedto the detent lever. Thus. with the levers extending below theprojection Ill. as shown clearly in Figs. 11 and 12. The projection Illais arranged to'be engaged by aconnecting pin Iii secured in the slideIll and extending forwardly therefrom through a slot in the forwardhousing plate lll. The projection Ill is arranged to be engaged by aconnecting pinllla fixed in a bar Ill rigidly secured to the slide lli,said pin also extending forwardly from the slide through a slot intheforward housing plate lll. The length of the pin II In is such that itdoes not project for-' wardly far enough to engage the projection Illa,

as shown in Fig. 11. In order to enable the projections Ill and Illa toby-pass the pins III and II is when the coupling slides are heldstationary during the advance of the carriage, each of the projectionsis provided with a cam face III arranged to engage the correspondingpin.

The above described mechanism has the following mode of operation:Referring to the mechanism controlled by the coupling slide lll, whenthe slide is in its normal left-handposition, with relation to thehousing plates III as shown in Fig. 12, the connecting pin III islocated in the position shown in this figure with relation to theprojection Illa on the connecting lever Ill. When the slide is heldstationary by the engagement of the coupling dog lll with the lug "I ona column register. the connecting pin Iii is engaged with the cam III onthe projection Illa and the laterally extending arm of the connectinglever Ill is lifted to allow the pin to pass the projection, after whichthe connecting lever is swung back to its normal position by the spring46], these movements of the lever being produced without aifecting thedetent lever I which remains in its normal clutch disengaging position.When the coupling slide 4'" is released by the action of the couplingdog, and the slide is moved back to the left (Fig. 12) by the slideactuating spring. the connecting pin Ii I engages the righthand side ofthe projection Illa, thereby swinging the detent lever I in a clockwisedirection to disengage the stud Ill from'the tail of the pawl I andthereby set in operation the onerevolution clutch. During this movementof the detent lever III, the connecting lever Ill swings as a unittherewith, carrying the projection Illa upwardly until it slips, off thepin II I. After the pin Ill passes beyond the connecting lever ill, thelevers "I and Ill are restored to their normal positions, as shown inFig. 12, by the action of the spring I so that the stud III on the leverI will again engage the tail of the pawl I to disengage the clutch asthe disk lll completes a revolution.

The one-revolution clutch is tripped in the same manner by the action ofthe coupling slide lll, the pin II is on this slide acting on theconnecting lever Ill to swing the detent lever'lII to trip the clutchduring the retracting movement of the slide. r

The one-revolution clutch shown in Fig. 11 is arranged to reset thetransfer mechanisms of both the crossfooters in the event that theseveral transfer mechanisms have been operated during the passage of thecarriage through the zone of a column register. To this end, the rockshaft in the relative positions shown in'this figure, the 75 "I isextended across the rearof the type car-

